Why are material animations not responding?
First, change the options in the tab, Material - Options - Object
Color and deactivate Use Mist.
Then, go to Timeline and place your marker in FRAME 1, go back to
the Object tab change the Object - Options - Object Color tab (you
will cmbios).
Change color or alpha according to your needs and insert a KEYFRAME
(place the mouse over the LMB level controls and select insert 1
keyframe).
Now, go to Timeline and place the marker in the frame you need in
this case, use FRAME 2.
Return to the Object tab and see options color object, again you
have the color or transparency adjustment you need and insert a new
keyframe.


Now try placing the mouse in Timeline or give play to your animation, it should work correctly.


  Follow the gif that I made this complete step by step: